A lot of area to cover with epoxy, so need to work fast. Need to mix several batches. Apply epoxy to both surfaces and let soak in before putting wood pieces together. Once plywood (skin) laid on frame, plywood tends to slide. Used staples at ends to stop sliding and hold in place. Used cinter blocks over all skin area. Re-enforced cross members to hold weight of cinder blocks. Apply ample amount of epoxy to form fillets at junctions